Google Cardboard Kit DIY 3D glasses by Lubar Virtual Reality Video Viewer Compatible with Android and IOS Smartphone Compatible with all smart phones: Google Cardboard set is compatible with all the smart phones with screen from 3.5" to 6" Best 3D viewing experience: Google Cardboard set take high quality biconvex lenses with a 45mm focal length, which give you a truly stunning, engrossing VR experience by converting your smart phone to your private 3D cinema. Easy setup: Through our easy printed instruction with QR codes, you can assemle your virtual reality viewer in minutes and get fast access to a range of fantastic VR ready experiences from games to scenic tours! Made of high-grade material and with fine workmanship. High quality and inexpensive : simple DIY Google virtual reality glasses.